409 stainless steel construction ensures durability and long-term performance
Flow FX series straight-through muffler delivers powerful sound and eliminates drone
Active valve control with integrated turndown allows dynamic sound adjustment for different driving modes
Fits both 2 and 4 wheel drive GM trucks for versatile application
Retains factory exhaust bezel and uses all factory hanger locations for seamless installation
Summarized by Shop
Flowmaster's® FlowFX Cat-Back exhaust system for the 2020-2026 GM 2500HD and 3500HD trucks with the 6.6L gas engines gives you a great way to help you customize your GM truck to your personality. This performance exhaust system fits both 2/4 Wheel drive models and is manufactured from 409 stainless steel for years of trouble-free service
Inlet Pipe Length
3.50 inches
Muffler Material
409 stainless steel
Muffler Type
Flow FX series, straight-through
Tailpipe
Dual 2.5 inch mandrel bent, exits in bumper cut-out locations
Dyno Gains
11-15 HP, 10-13 lb-ft torque (varies by model)
Compatibility
2020-2026 GM 1500/2500/3500HD with 6.2L/6.6L gas engines